Littelfuse 0263.750M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0263.750M is a 750 mA, 250 V AC/DC board mount axial fuse from the PICO® II 263 series. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The part is designed for through-hole mounting applications requiring fast-blow response characteristics and is approved by CSA and UR agencies.

Substiute Parts

0263.750M

Littelfuse Inc.In Stock: 7730263.750M Datasheet

Current PartRFQ

0263.750MXL

Littelfuse Inc.In Stock: 11120263.750MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 0263.750M is determined by strict equivalence across the following critical parameters: current rating (750 mA), voltage rating (250 V AC), response time (fast blow), mounting type (through hole), package style (axial), breaking capacity (50 A), melting I²t (0.0411), operating temperature range (-55°C to 125°C), physical dimensions (0.155" Dia x 0.280" L), and approval certifications (CSA, UR). The substitute part must maintain identical electrical and mechanical characteristics to ensure direct compatibility in existing circuit designs without modification.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0263.750MXL serves as the direct substitute for the obsolete 0263.750M. Both parts are manufactured by Littelfuse Inc. within the PICO® II 263 series and maintain identical electrical and mechanical specifications. The primary distinction is product status: the 0263.750M is obsolete while the 0263.750MXL is active and currently in production. Additionally, the 0263.750MXL achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. For new designs and ongoing procurement, the 0263.750MXL is the appropriate selection, offering equivalent performance with improved regulatory compliance and assured supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the 0263.750MXL be used as a direct replacement for the 0263.750M?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters: 750 mA current rating, 250 V AC voltage rating, fast-blow response, through-hole axial mounting, 50 A breaking capacity, and identical physical dimensions. Direct substitution is possible without circuit modification.

Q: What is the difference between the 0263.750M and 0263.750MXL?

A: The primary differences are product status and regulatory compliance. The 0263.750M is obsolete, while the 0263.750MXL is active. The 0263.750MXL is ROHS3 compliant, whereas the 0263.750M is RoHS non-compliant. Electrical and mechanical performance are identical.

Q: Are there packaging differences between these parts?

A: The 0263.750M and 0263.750MXL share identical package specifications: axial configuration with dimensions of 0.155" diameter by 0.280" length (3.94mm x 7.11mm). Both are designed for through-hole board mounting without modification to PCB layouts.

Q: What certifications apply to both parts?

A: Both the 0263.750M and 0263.750MXL carry CSA and UR approvals, meeting the same safety and performance standards required for board-mount fuse applications.

Q: Is the 0263.750MXL suitable for the same operating temperature range?

A: Yes. Both parts operate across the identical temperature range of -55°C to 125°C, ensuring equivalent thermal performance in the same application environments.